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This commit is contained in:
bryanqiu 2022-11-15 15:18:16 +08:00
parent a1ade9e06f
commit 8d97cdae89
1 changed files with 21 additions and 21 deletions
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34
zkp.go
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@ -16,10 +16,22 @@ import (
type DLogProof struct {
ChallengeResponse *big_Int `json:"cr"`
ChallengeResponseXXXX *big.Int `json:"cr___TODO______debug"`
RandomPoint string `json:"pkr"`
}
func (dlogproof *DLogProof) ToString() string {
var b, _ = json.Marshal(dlogproof)
return string(b)
}
func DLogProofFromString(jsonstr string) (*DLogProof, error) {
var proof = DLogProof{}
if err := json.Unmarshal([]byte(jsonstr), &proof); err != nil {
return nil, err
}
return &proof, nil
}
/*
* Prove:
* step 1. generate random bignumber: skr, let pkr = skr * G
@ -48,7 +60,8 @@ func DLogProve(sk *big.Int) (proof *DLogProof, err error) {
// Step 2. caculate challenge: c = SHA256(pkr || G || pk)
challenge := fmt.Sprintf(
"%x,%x@%x,%x@%x,%x", pkr.X, pkr.Y, Gx, Gy, pk.X, pk.Y)
"%064x,%064x@%064x,%064x@%064x,%064x",
pkr.X, pkr.Y, Gx, Gy, pk.X, pk.Y)
chash256 := sha256.Sum256([]byte(challenge))
var c = new(big.Int).SetBytes(chash256[:])
log.Debugf("challenge='%s',c='%x'", challenge, c)
@ -63,7 +76,6 @@ func DLogProve(sk *big.Int) (proof *DLogProof, err error) {
proof = &DLogProof{
RandomPoint: fmt.Sprintf("%x,%x", pkr.X, pkr.Y),
ChallengeResponse: (*big_Int)(cr),
ChallengeResponseXXXX: cr,
}
return proof, nil
}
@ -93,7 +105,8 @@ func DLogVerify(pkstr string, proof *DLogProof) bool {
Gx := cv.Params().Gx
Gy := cv.Params().Gy
challenge := fmt.Sprintf(
"%x,%x@%x,%x@%x,%x", pkr.X, pkr.Y, Gx, Gy, pk.X, pk.Y)
"%064x,%064x@%064x,%064x@%064x,%064x",
pkr.X, pkr.Y, Gx, Gy, pk.X, pk.Y)
chash256 := sha256.Sum256([]byte(challenge))
var c = new(big.Int).SetBytes(chash256[:])
var cr = (*big.Int)(proof.ChallengeResponse)
@ -129,16 +142,3 @@ func HexStringToS256Point(pstr string) (*ecdsa.PublicKey, error) {
}
return &pk, nil
}
func (dlogproof *DLogProof) ToString() string {
var b, _ = json.Marshal(dlogproof)
return string(b)
}
func DLogProofFromString(jsonstr string) (*DLogProof, error) {
var proof = DLogProof{}
if err := json.Unmarshal([]byte(jsonstr), &proof); err != nil {
return nil, err
}
return &proof, nil
}